The Nut,plain,spline, cataloged under National Stock Number 5310-00-451-9019, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rex Systems Incorporated Dba Rex Systems Inc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-451-9019 |
| Primary Part Number | 502B134 |
| Item Name | Nut,plain,spline |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rex Systems Incorporated Dba Rex Systems Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | QQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.047 INCHES NOMINAL NUT IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.138 INCHES IN |
| Nut Diameter | 0.250 INCHES NOMINAL IN |
| Counterbore Diameter | 0.149 INCHES NOMINAL NUT IN |
| Pilot Diameter | 0.184 INCHES MINIMUM AND 0.186 INCHES MAXIMUM IN |
| Pilot Length | 0.105 INCHES NOMINAL IN |
| Nut Height | 0.475 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | SPLINE |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 303 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 502B134 PRIMARY | Rex Systems Incorporated Dba Rex Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 502B134 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-451-9019 is a Nut,plain,spline, manufactured by Rex Systems Incorporated Dba Rex Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-451-9019 has 1 manufacturer part number on file: 502B134 (Rex Systems Incorporated Dba Rex Systems Inc).
Key specifications for 502B134: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: QQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Nut Counterbore Depth: 0.047 INCHES NOMINAL NUT IN. 16 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.